SAN ANTONIO—Veterans Padraig Harrington and Matt Kuchar each shot a 4–under 68 on Thursday to share the early lead with MJ Daffue and Roberto Diaz in the weather-delayed first round of the Valero Texas Open. Daffue eagled the par-5 18th hole at TPC San Antonio and Diaz made birdie on 18 to join the 51-year-old…